On January 1, 1863, Abraham Lincoln legally changed the status of over 3 million people from “slave” to “free.” But his emancipation proclamation wasn’t a law — it was an executive order. The framers of the American Constitution made this power available to the executive branch. But what exactly is this tool, how does it work, and what’s the extent of its power? Christina Greer explains.

For most jobs, it’s understood that you can be fired – whether for crime, incompetence, or just poor performance. But what if your job happens to be the most powerful position in the country – or the world? That’s where impeachment comes in. But how does it work? Alex Gendler details the process of impeachment.

On August 13, 1961, construction workers began tearing up streets and erecting barriers in Berlin. This night marked the beginning of one of history’s most infamous dividing lines: the Berlin Wall. Construction continued for a decade as the wall cut through neighborhoods, separated families, and divided not just Germany, but the world. Konrad H. Jarausch details the history of the Berlin Wall.